gwistat updates

make some updates to gw_ifo_stat program used for gwistat at online.ligo.org:

• reduce time between storing data
• add logic to write data immediately upon state change
• fix the bits used to account for differences between KAGRA and HLV

gstlal-ugly/bin/gstlal_ifo_stat

@@ -81,7 +81,15 @@ class IFOStatusTracker(object):
 			time, bit = s.getvalue().split('\n')[0].split()
 			bit = int(bit)
 			time = float(time)
-			state = 1 if (bit & 0b1 == 0b1) else 0
+
+			## FIXME hacky
+			if ifo == "K1":
+				# only check 0th bit
+				state = 1 if (bit & 0b1 == 0b1) else 0
+			else:
+				# for HLV check 0th and 1st bit
+				state = 1 if (bit & 0b11 == 0b11) else 0
+
 			statechange = False
 
 			## track duration